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Graphene aqueous solution and preparation method thereof

A technology of graphene aqueous solution and graphite, which is applied in the field of graphene aqueous solution and its preparation, can solve the problems of unstable graphene aqueous dispersion, performance degradation, etc., achieve good intrinsic structure, maintain intrinsic structure, and be environmentally friendly

Inactive Publication Date: 2018-09-14
SHENZHEN EIGEN EQUATION GRAPHENE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a graphene aqueous solution and a preparation method thereof, aiming at solving the problem that the graphene aqueous dispersion prepared by the existing method is unstable and has reduced performance

Method used

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  • Graphene aqueous solution and preparation method thereof
  • Graphene aqueous solution and preparation method thereof
  • Graphene aqueous solution and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The graphene aqueous solution of this embodiment is prepared by the following method:

[0055] (1) Take graphene and potassium hydroxide raw materials of corresponding quality in the ratio of 1:6 with graphene: potassium hydroxide mass ratio;

[0056] (2) After mixing the above raw materials, add them to the agate ball mill jar, and install it on a planetary ball mill at a speed of 300 rpm, and mill for 48 h;

[0057] (3) Use deionized water to transfer the product after ball milling, and perform centrifugation at a speed of 3000 rpm for 10 minutes, and take the upper layer solution after the end;

[0058] (4) The obtained solution was dialyzed in deionized water for 48 h until the solution was neutral;

[0059] (5) The obtained product was subjected to ultrasonic treatment for 3 h, and the ultrasonic frequency was set to 50 Hz, and finally the desired graphene aqueous solution was obtained.

Embodiment 2

[0061] The graphene aqueous solution of this embodiment is prepared by the following method:

[0062] (1) Take graphene and potassium hydroxide raw materials of corresponding quality in the ratio of 1:10 with graphene: potassium hydroxide mass ratio;

[0063] (2) After mixing the above raw materials, add them to the agate ball mill jar, and install it on a planetary ball mill at a speed of 300 rpm, and mill for 48 h;

[0064] (3) Use deionized water to transfer the product after ball milling, and perform centrifugation at a speed of 3000 rpm for 10 minutes, and take the upper layer solution after the end;

[0065] (4) The obtained solution was dialyzed in deionized water for 48 h until the solution was neutral;

[0066] (5) The obtained product was subjected to ultrasonic treatment for 3 h, and the ultrasonic frequency was set to 50 Hz, and finally the desired graphene aqueous solution was obtained.

[0067] The characterization test of the present embodiment graphene aqueou...

Embodiment 3

[0069] The graphene aqueous solution of this embodiment is prepared by the following method:

[0070] (1) Take graphene and potassium acetate raw materials of corresponding quality in the ratio of 1:10 with graphene: potassium hydroxide mass ratio;

[0071] (2) After mixing the above raw materials, add them to the agate ball mill jar, and install it on a planetary ball mill at a speed of 500 rpm, and mill for 48 h;

[0072] (3) Use deionized water to transfer the product after ball milling, and perform centrifugation at a speed of 3000 rpm for 10 minutes, and take the upper layer solution after the end;

[0073] (4) The obtained solution was dialyzed in deionized water for 48 h until the solution was neutral;

[0074] (5) The obtained product was subjected to ultrasonic treatment for 3 h, and the ultrasonic frequency was set to 50 Hz, and finally the desired graphene aqueous solution was obtained.

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Abstract

The invention discloses a graphene aqueous solution and a preparation method thereof. Graphene and a compound with carboxyl or hydroxy are used as raw materials, and the graphene aqueous solution is prepared by a ball-milling method. The method has the advantages that (1) under the effect of ball-milling, carbon atoms of a graphene edge structure react with the compound with carboxyl or hydroxy, an oxygen-containing functional group is introduced on an edge portion, and the hydrophilic capacity of the graphene is enhanced; the damage of a ball-milling process to graphene sheet layers is far less than the damage of strong oxidation effect to the graphene sheet layers, therefore, the intrinsic structure of the graphene can be maintained well, and various excellent properties of the grapheneare maintained to a maximum extent; and the used method does not have a complicated process, is simple and easy to operate, and is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a graphene aqueous solution and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional planar structure material with only a single layer of carbon atoms. On the plane of graphene, sp 2 The hybridized carbon atoms are closely arranged in a honeycomb lattice. Graphene can be curled in different shapes to form carbon nanotubes or fullerenes, and its continuous stacking can form three-dimensional sheet graphite. [0003] The special structure of graphene makes it have many excellent properties. Graphene is the hardest substance found so far, and has excellent mechanical properties (1060 GPa), and its theoretical specific surface area is as high as 2600 m 2 / g, with outstanding thermal conductivity up to 3000 W / (m K). In addition, graphene also has good electrical conductivity, and its electron mobility can be as high as 20000 cm at room tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 刘剑洪刘贵燃熊威刘金鑫李芳黄少銮张小勇张黔玲何传新孙学良欧阳晓平吴奇
Owner SHENZHEN EIGEN EQUATION GRAPHENE TECH CO LTD
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